@ Cal Perforances - Greek Theatre, 2001 Gayley Road, Berkeley. The acclaimed cellist returns to the Greek for a special performance of Bach’s cello suites. http://www.calperformances.org

@ San Fransisco City Hall, 1 Dr. Carlton Goodlett Place, Rm 284. Supervisor Rafael Mandelman welcomes artist Jun Yang whose art is currently on display. 4-5pm. mandelmanstaff@sfgov.org

@ Rotary Summit Center, 88 S. 4th Street, San Jose. With the theme “Progress Never Stops,” BAYMAC continues its thirty-four years of advocacy with California State Senate President pro Tempore Toni Atkins as the keynote speaker. 10am-2pm. http://www.baymec.org

@ Folsom Street, San Francisco. Leather and fetish fans from all over the world gather for the lagest annual leather event in the U.S. 11am-6pm. http://www.folsomstreetevents.org

@ Jane Warner Plaza, 17th and Castro Streets. Underground independent musician Rob Reich’s music defies genre and combines a strong melodic ideas, rhythmic drive and a spirit of irreverence and experimentation. 1-2pm. http://www.castrocbd.org